package com.cm.study.other.classstudy;

import java.util.Enumeration;
import java.util.Properties;

public class StudySystem {
    public static void main(String[] args) {
        System.setProperty("caimao","caimao");
        Properties properties = System.getProperties();
        Enumeration<Object> keys = properties.keys();
        while(keys.hasMoreElements()){
            Object o = keys.nextElement();
            System.out.println(o+"-->"+properties.getProperty(o.toString()));
        }
        while (true){}
    }
}
